Review on Efficient 12 Volt Automatic Battery Float Trickle Charger by Cen-Tech - A Reliable Power Solution by Kevin Barbon

I use this to charge the car battery in a car that is slowly draining due to the secondary security system and electric door system. I just plug it in every few days depending on how much the machine is being used (and charging) or not being used (and slowly draining). It was a very reliable and inexpensive solution to my situation.